
While federal laws take precedence over state laws, local law enforcement officials' jurisdiction is limited by the local government's legal jurisdiction. This means that local law enforcement officials are generally not authorized to enforce federal law unless they are granted specific powers by the federal entity that has jurisdiction over that law. However, there are instances where state enforcement of federal law occurs, and states can adjust the intensity of enforcement and interpret federal laws through their enforcement authority.
| Characteristics | Values |
|---|---|
| Can municipal law enforcement enforce federal laws? | Generally, local law enforcement officials are not authorized to enforce federal law unless they are granted jurisdiction by the federal entity that has jurisdiction over the law or in cases where federal statutes authorize civil enforcement by the states. |
| Do municipal and state police have to cooperate with federal police? | Technically, there is no federal police. However, federal laws are supreme, and local authorities cannot stand in the way of their enforcement. While local sheriffs can choose not to participate in a given action, they are under wider consequences. |
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What You'll Learn

Local law enforcement officials' jurisdiction
Local sheriffs have the autonomy to choose not to participate in enforcing federal laws, as seen in the case of anti-immigrant states where local authorities demanded the right to enforce these laws but were not permitted to do so. This dynamic between federal and local law enforcement creates a complex interplay of powers and jurisdictions, with federal laws ultimately holding supreme authority.
The enforcement of federal laws is a unique form of state power, as it enables states to exert influence by adjusting the intensity of enforcement and interpreting federal laws through their enforcement actions. This dynamic is exemplified in the Arizona v. United States decision, where state authorities attempted to enforce a federal law, but most of their actions were struck down due to excessive entanglement between different levels of government.
While there is no entity called the "federal police," federal agencies like the US Marshals, FBI, DEA, ATF, Border Patrol, and Immigration and Customs Enforcement officers hold authority over local law enforcement and can negotiate agreements with local authorities to carry out their operations. Ultimately, local law enforcement officials' jurisdiction is confined within the legal boundaries of the local government they represent, and they are not authorised to enforce federal laws unless specifically deputised or granted power by the relevant federal entity.
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Immigration law
While state and local police may only carry out immigration enforcement if specifically authorized to do so by the federal government, they can still play a role in enforcing immigration laws through various cooperation programs with Immigration and Customs Enforcement (ICE). One such program is the 287(g) Program, which allows ICE to delegate specified immigration officer duties to state and local law enforcement officers under the agency's direction and oversight. This program includes three models: the Jail Enforcement Model, the Task Force Model, and the Warrant Service Officer program. The first identifies and processes removable aliens with criminal or pending criminal charges who are arrested by state or local law enforcement. The second serves as a force multiplier for law enforcement agencies to enforce limited immigration authority with ICE oversight during their routine duties. The third allows ICE to train and authorize state and local officers to serve and execute administrative warrants on aliens in their jails.
In addition to these formal programs, local law enforcement agencies may also communicate with ICE agents in an unregulated fashion. For example, police may contact ICE regarding a driver stopped for a traffic violation if they suspect the driver is not authorized to be in the country. This informal mechanism of cooperation can be problematic, as it may be rife with racial profiling.
Some jurisdictions have adopted sanctuary policies, which limit local cooperation with federal immigration enforcement. These policies do not prevent federal officials from carrying out their duties but may restrict local officials from holding immigrants in state or local jails following an ICE detainer.
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Federal deputation
While there is no federal police force in the US, federal laws take precedence over state laws. Local law enforcement officials' jurisdictions are limited by the local government's legal jurisdiction. This means that local law enforcement officials are not authorized to enforce federal law unless they are given power by the federal entity that has jurisdiction over that law. This process is known as federal deputization.
Federal deputization is the process by which a local law enforcement officer is given the authority to enforce federal laws. This can occur when the federal entity with jurisdiction over a specific law extends its power to a local official, often through negotiated agreements. For example, in the case of Arizona v. United States, state authorities attempted to enforce a federal law, which was largely struck down due to the entanglement between different levels of government. However, Arizona sheriffs were federally deputized to enforce federal immigration law.
The Administrator of the Transportation Security Administration (TSA) may also deputize state or local law enforcement officers to carry out federal airport security duties. These officers are then treated as federal law enforcement officers for specific legal purposes and are subject to federal supervision and control.
It is important to note that while federal laws take precedence, states are not obligated to enforce them. They cannot actively stand in the way of federal enforcement without facing consequences, but they can choose not to participate in a given action. For example, while Colorado cannot legally bar DEA agents from enforcing federal laws within the state, they are under no obligation to assist in those enforcement actions.
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Federal laws supreme
Federal laws are supreme over state laws, but local law enforcement officials' jurisdictions are limited by their local government's jurisdiction. This means that local law enforcement officials are generally not authorized to enforce federal law unless they have been deputized by a federal entity with jurisdiction over the law in question.
Local law enforcement officials can generally enforce federal criminal law, but they do not have the power to enforce civil immigration law. For example, in the case of Arizona v. United States, state authorities attempted to enforce a federal law, which was struck down due to entanglement between different types of government. However, in this case, Arizona sheriffs were federally deputized to enforce federal immigration law.
Federal laws are enforced through a combination of public and private efforts. Federal civil statutes typically vest enforcement authority in a federal agency, and some create private rights of action that permit private parties to sue to enforce federal law. There are two distinct types of public enforcement: federal agency enforcement and state enforcement. While state enforcement of federal law is unique, it is not dependent on regulatory authority. This means that states can enforce federal laws even if they have not created their own laws or regulations in that area.
The Bureau of Land Management (BLM) is an example of a federal agency with law enforcement officers that enforce federal laws. BLM officers do not have the authority to enforce state laws unless they have written authorization from a state official.
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State enforcement of federal law
While there is no federal police force, federal laws take precedence over state laws. Local law enforcement officials' jurisdiction is limited by their local government's jurisdiction. This means that local law enforcement officials are not authorized to enforce federal law unless they are granted specific powers by the federal entity that has jurisdiction over that law.
Although state enforcement is largely decentralized, states act on behalf of interests that differ significantly from those of federal enforcers. Many federal statutes authorize civil enforcement by a federal agency and the states, typically through their attorneys general.
In practice, federal and state forces must cooperate. While states are not obligated to enforce federal laws, they cannot stand in the way without facing wider consequences.
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Frequently asked questions
Municipal law enforcement cannot enforce federal laws without federal deputization. Local law enforcement officials' jurisdiction is limited by the local government's legal jurisdiction.
In Arizona v. United States, state authorities attempted to enforce a federal law, which was struck down due to it being too much of an entanglement between the different types of government.
Federal laws are supreme and can override state laws. However, states are not obligated to enforce federal laws.





































